JP2503302B2 - Flexible plate edge bending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an edge bending machine for edge portions of a printing plate.

[Prior Art] An edge bending device having one edge plate for each end of a plate and one edge bending roll cooperating with the edge plate is a DE-OS 20.
It is known from 13 364. In order to remove the plate that has been edge-bent from the edge-bending device, the edge plate is swiveled around an axis. However, edge plate movement can result in non-parallelism between the front and rear edge plates.

[Problems to be Solved by the Invention] An object of the present invention is to provide an edge bending machine for a plate that can be removed from the edge bending machine without causing a problem and without moving the edge plate. is there.

[Means for Solving the Problems] The means for solving the above-mentioned problems of the present invention is that the supporting surface of the machine base has a shape curved downward between the end portions.

The advantages of the invention are in particular the avoidance of parallelism errors which occur between the trailing edge and the leading edge of the printing plate and which are caused by the bearing of the movable member, for example the movable edge plate. Is Rukoto. Furthermore, for example, as required by the security press architecture,
It is possible to carry out very narrow cylinder grooves (for example 5) with extremely small tightening distances, since the plate can be bent at more than 90 ° at both ends.

Another advantage is that the printing plate is pre-deformed at least partially in the clamping range, especially in the critical areas. This alleviates the subsequent mounting process of the plate on the plate cylinder. Further, the plate edge bender can be adapted to various format dimensions.

Example An edge-bending machine 1 for a flexible printing plate of a printing machine comprises a machine base 3 and two saddles 4,6. The first support surface 7 of the machine base 3 for the printing plate has a shape (concave surface) which is curved downward between the left end 8 and the right end 9 in the drawing. Each saddle portion 4, 6 has a cylindrical (convex) second and third support surface 11, 12 which is curved upward.

The saddle 4 for the front edge of the printing plate is fixedly connected to the machine base 3 and has a stationary edge plate 13. Second support surface
The angle α formed between 11 and the lower surface 14 of the edge plate 13 is, for example, about 30 °. This means that the leading edge of the plate is about
It means that it can be bent 150 °. Other angles α are of course possible.

A saddle 6 for the trailing edge of the plate is pivotably mounted. This is optionally used for the required format adjustment, which can be done via an adjusting member 17 (for example a worm gear). Worm transmission
The 17 can be set in the adjusting position without play.

The edge plate 18 of the saddle 6 forms an angle β between the third support surface 12 and the lower surface 19, which angle is, for example, 80 °. this is,
This means that the trailing edge of the plate is bent 100 ° in this embodiment. In this case, of course, another angle β is possible.

Side plates 21 and 22 are rotatably arranged on both end surfaces of the saddle portion 4. The side plates 21, 22 are connected to each other via a shaft 23 and a shaft 24, and the journals 26, 27 of the saddle part 4 are respectively provided.
It is supported so that it can turn around.

The shaft 23 is rotatably supported by the side plates 21 and 22. The shaft has a handgrip 28 fixed in the center,
The shaft 23 is provided with a plurality of (for example, two) tightening plates 29 and 31 which are non-rotatably connected to each other and are eccentrically supported. The surfaces of the clamping plates 29, 31 act as pressing members on the surface 32 of the U-shaped bending element 33, which is pivotally supported at its first end 34 on the shaft 24. The second end 36 extends over the entire width of the saddle portion 4 and has an inwardly curved crimping surface 37 which is crimped to the curved surface of the saddle portion 4. The U-shaped bending member 33 surrounds the crimp roll 38, which is rotatably supported by two levers 39 and 41. The lever is first
It is pivotally mounted on the shaft 24 in its end 34.

The compression springs 42 are attached to the levers 39 and 41 with one end,
And it is attached to the side plates 21 and 22 at the other end. The compression spring 42 strengthens the crimping force of the crimping roll 38 against the machine base 3 or the plate on this.

An edge bending game 43 is movably supported in a pedestal 44 in a vertical direction. The platform 44 is rotatably supported by two pins 46 and 47 provided on the side plates 21 and 22, respectively.

The edge bending beam 43 is formed by the edge plate 13 and the subsequent registration plate.
Can be contacted with 48. The register plate 48 comprises a plurality (eg four) of submersible register pins 49 distributed over its length and is pivotably mounted about an axis 50. The shaft is the two side stays 5 of the saddle part 4.
It is rotatably supported in 1,52.

In order to fix the side plates 21 and 22 to the machine base 3 in the "working position II", the machine base 3 and the side plates 21 and 22 are each provided with one locking mechanism. This means may be for example spring loaded pins 53,5
The pins, which may be 4, are supported in holes in the side plates 21, 22 and in the locking position corresponding countersinks 5 in the machine base 3
Engage into 6,57.

The saddle 6 for curving the trailing edge of the plate is provided with two journals 58, 59, which are pivotally mounted on the two bearing blocks 61, 62 via these journals. The bearing blocks 61, 62 are fixed to the machine base 3.
Journals 58 and 59 are not rotatable relative to levers 63 and 64, respectively.
And the lever has fork-shaped bearings 66; 67 for a holding member 68. Lower surface 6 of the pressing member 68
9 is adapted to the curvature of the third support surface 12 of the saddle part 6. The journals 58,59 have two side plates 71,7 pivotally mounted outside the fixed points for the levers 63,64, respectively.
2, supporting the side plates, which are joined together by beams 73.

Furthermore, the journal 58 is shrink-fitted with a gear or a gear segment (for example, a worm gear), which is drivingly connected to a driving device (for example, a spindle) and constitutes a worm transmission 17 for format adjustment. .

A platform 79 is rotatably supported in the side plates 71 and 72 via two pins 77 and 78. A second curving beam 81 for the plate end is movably supported on the platform 79 in the vertical direction. The devices for lowering the edging beams 43,81 are respectively provided with two eccentrically mounted actuating cams 89,91; 82,8.
It is outlined by 3.

One pressing roll 84; 86 is provided on the inner surface of each of the side plates 71 and 72.
Is rotatably supported.

Further, the side plates 71 and 72 are respectively attached to the lower end portions 87 and 88 of these side plates.
It is equipped with a device for locking 71, 72 in "work position II". The locking device comprises, for example, one spring-loaded pin 92, 93, which engages in countersinks 94; 96 in levers 63, 64 in "working position II".

To attach the plate to this edge bending machine 1, side plates 21, 2
2 and 71, 72 are swung to both sides and brought into "support position I" (Fig. 2). The plate is then hung on the register pins 49 of the register plate 48 with pre-punched holes in the front of this plate. The side plates 21, 22 are pivoted in a clockwise direction until the spring-loaded pins 53, 54 engage in countersinks 56, 57 and are brought into the "working position II". During this pivoting movement, the pressure roll 38 provided with the rubber jacket rolls on the register pin 49, at which time the register pin is slightly pressed into the rubber jacket. Of course, a groove can be provided in the range of the register pin 49 without hindering the operation of the crimp roll 38.

The pressure roll 38 rolls on the front of the plate to the transition line (end 8) between the saddle 4 and the machine base 3. As a result, the plate is fixedly fastened to the register pin 49, and the second saddle member 4
It is deformed according to the curvature of the support surface 11 of the.

Since the radii of curvature of the saddles 4, 6 are smaller than the radius of curvature of the plate cylinder provided (about 10%), the plate has a residual deformation approximately equal to the radius of curvature of the plate cylinder specified for this plate. are doing.

The bending element 33 is pressed down via the clamping plates 29, 31 towards the front of the printing plate, in which case the crimping surface 37 acts on the saddle 4 behind the registration plate 48.

The machine base 3 has a large number of suction holes 98 (for example, 12 × 16 = 192 holes) distributed over the first support surface 7, and the suction holes can be sequentially loaded with suction air from left to right. When the suction device is operated, the plate is attracted to the machine base 3 almost up to the transition line (end 9) between the machine base 3 and the saddle part 6. Further, the pressing member 68 is swung down in the clockwise direction and brought down onto the edge of the plate.

When the side plates 71 and 72 are swung from the "support position I" to the "working position II", the crimping rolls 84 and 86 come into contact with the upper surface 99 of the pressing member 68 and press the pressing member firmly onto the end of the plate. To do. The plate is now firmly supported on the machine base 3 or the saddles 4, 6.

The edging beams 43, 81 are moved vertically downwards until they rest firmly on the plate. Register pin
The 49 is submerged in the register plate 48 and the register plate 48 is swiveled counterclockwise. Then the curving beam
43 cooperates with the pedestal 44 in the counterclockwise direction about the pins 46 and 47, or the edge bending game 81 cooperates with the pedestal 79 in the clockwise direction about the pins 77 and 78. It can be turned.

The bending angle of the bending beam 43 is about 150 °, and the edge bending beam 81
The turning angle of is about 100 °.

In order to remove the plate from the machine base 3, the pressing members 68, 3
3 is swung away from the plate and the suction hole 98
If the suction air supply to the air is stopped, it is controlled so as to supply the blow air to these holes.

Due to the inherent elastic tension of the plate, the plate tends to return to its stretched shape in the area of the machine base 3, for which the edge of the plate bent is disengaged from the edge plates 13,18. Almost horizontal. Therefore, the plate can be easily removed from the machine base 3 upward.

[Brief description of drawings]

FIG. 1 is a schematic side view of an edge bending apparatus according to the present invention in a “working position”, FIG. 2 is a view corresponding to FIG. 1 in a “supporting position”, and FIG. FIG. 4 is a view of an edge bender for the plate, and FIG. 4 is a view of the edge bender for the plate back. 1 ... Edge bending machine, 3 ... Machine stand, 4,6 ... Saddle section, 7,11, 12 ...
… Supporting surface, 8,9,87,88 …… End, 13,18 …… Edge plate, 14,19,
69 …… Lower surface, 17 …… Worm transmission, 21,22,71,72…
… Side plate, 23 …… Shaft, 24,50 …… Axis, 26,27,58,59…
… Journal, 28 …… Handgrip, 29,31 …… Tightening plate, 32 …… Top surface, 33 …… Bending member, 34 …… First end,
36 …… Second end, 37 …… Crimping surface, 38 …… Crimping roll, 3
9,41,63,64 …… Lever, 42 …… Compression spring, 43,81 …… Bending beam, 44,79 …… Stand, 46,47,53,54,77,78,92,93
…… Pin, 48 …… Registration plate, 49 …… Registration pin, 5
1,52 …… Side stays, 56,57,94,96 …… Counterholes, 61,62…
… Bearing block, 66, 67 …… Bearing part, 68 …… Holding member, 73 …… Beam, 82, 83, 89, 91 …… Actuating cam, 98 ……
Suction hole, 99 …… Top surface

Front Page Continuation (72) Inventor Anna Barbara Ziegler Federal Republic of Germany Oxenfurt Zuiber Leader Schuuteige 16 (56) Reference JP-A-56-45217 (JP, A) , U) Actual development Sho 62-150139 (JP, U) Actual public Sho 58-26116 (JP, Y2)

Claims (7)

(57) [Claims] 1. A rim-bending machine (1) for bending an end of a flexible printing plate, the first supporting surface (7) having one saddle (4, 6) at each end. Is provided with a machine base (3) having a first support surface (7) disposed between the second and third support surfaces (11; 12) of each of the two saddles (4; 6). Each saddle part (4; 6) is provided with one edge plate (13; 18) at the end, and the edge bending tool (44; 43;
71; 81) and pressing members (33; 68) are provided for crimping each end of the plate to the saddles (4; 6). ) Support surface (7)
Has a shape curved downward between the ends (8; 9) of the flexible plate edge edging machine. 2. The edge bending machine according to claim 1, wherein the saddle parts (4, 6) have convex supporting surfaces (11, 12). 3. The edge bending machine according to claim 2, wherein the radius of curvature of the convex support surface (11, 12) of the saddle (4, 6) is smaller than the radius of curvature of the plate cylinder to which the plate is to be fixed. 4. The edge bending machine according to claim 3, further comprising a suction device (98) for adsorbing the plate to the machine base (3). 5. An adjusting mechanism (1) for adjusting the saddle part (6).
7. The hemming machine according to claim 3, wherein 7) is provided. 6. The edge bending machine according to claim 3, wherein one saddle part (6) is arranged so as to be pivotable in a direction away from the machine base (3). 7. An edge-bending machine according to claim 6, further comprising a crimping roll (38).